Similar to "SYBAU" where one shuts their bitch ass up, instead it is used in an uplifting manner. Combining words Merch (Chicago slang meaning to put it on something, or to be able to provide factual evidence that something is what you're claiming it to be) and SYBAU.
Person A: Yoooo i got a new pair of jordans this weekend.
Person B: No chance, Merchbau it
Person A: Merchbau!
Person B: No chance, Merchbau it
Person A: Merchbau!
by urbandictor1523 February 4, 2026
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